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Патент USA US3043301

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July 10, 1962
D. l. NIELSEN
3,043,291
CHAIR FOR TAKING CARDIOGRAMS
Filed July 1, 1960
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ilnited States Patent
3,043,291
Patented July 10, 1962
1.
2
having a vertically elongated head 32.
'
3,043,291
CHAIR FOR TAKING CARDIOGRAMS
David I. Nielsen, 400 Westminster St.,
Newport Beach, Calif.
Filed July 1, 1960, Ser. No. 40,388
2 Claims. (Cl. 128—-2.06)
The invention relates to the taking of electrocardio
grams and more particularly relates to a chair in which a
patient may comfortably sit while a cardiogr-am is being
taken.
~
It is an object of my invention to provide ‘a cardio
graphic chair in which 1a person sits, in a normal posture,
While being examined so ‘as to simplify and speed up the
Blocks 33, in
which the cylinder 30 is mounted, hold the cylinder im- .
mobile and prevent it from rotating. Along the top of
the cylinder 30 is a slot 34, and from the slot 34 there
emerges a key 35 fastened in the rod 31. Thus the rod
31 is also prevented from rotating, ‘and a Vertical position
is assured for the head 32. The key 35 may be in the
form of a, screw-eye, and to it is fastened one end of a
spring 36. The other end of the spring 36 is secured to
-a front leg 14 of the chair, and tension of the spring urges
the rod 31 towards the front of the chair, the movement
being limited by the contact of the key 35 with the end
of the slot 34;
The head 32 is convex on its forward face.
The con
taking of electrocardiograms.
vex face is also having a hollow trough-like shape, like
Another object of my invention is to provide a chair
which has no straps for holding electrodes against the
the arm rests 11 and 12, so as to provide a Ibetter contact
with the calf of a person’s leg. Within the hollow 37 is
an insulating plate 38 and upon the insulating plate there
A further object of my invention is to provide a seat
is secured an electrode 39. An electrical connection 40
for a patient instead of ‘a bed, requiring less space and 20 connects the electrode 39 to the aforesaid cardiograph
having a better appearance, and being more easily moved
machine.
from place to place.
The electrode 39 is on the opposite side of the chair
Another object of my invention is to provide an eco—
from the two electrodes 21 and 22. The positions are
nomical and practical means for taking cardiograms rap
interchangeable; if the electrodes 21 and 22 are on the
idly and on a mass production scale.
right arm of the chair, the cylinder 30 is placed near the
In the accompanying drawings, illustrative of a pres
left legs of the chair so that the electrode 39 may make
ently preferred embodiment of my invention,
contact with the left leg of a person sitting in the chair,
FIG. 1 is a perspective view showing the general ar
or the electrodes 21 and 22 may be on the left chair arm
rangement of my new chair;
and the electrode 39 may operate against a person’s right
FIG. 2 is vertical sectional view on the line 2-2 of
leg.
FIG. 1, and on an enlarged scale, showing spring-con
In operation, when a person sits in the chair with his
trolled apparatus for bringing a leg electrode into’ contact
forearms on the arm rests 11 land 12, his forearms will fall
with a patient’s leg;
naturally into the trough-like hollows 18 and 19. It will
FIG. 3 is a vertical sectional view on the line 3-3
require positive muscular effort to raise his arms from the
of FIG. 1, showing the arrangement of two larm elec
hollows 18 and 19. Consequently his bare forearms rest
trodes on one arm of the chair;
upon the electrodes 20, 21, and 22 and make quite as good
FIG. 4 is a view similar to FIG. 3, showing the ar
contact with these electrodes as if the electrodes were
rangement of a single electrode on an arm of the chair;
strapped upon the 'arms. Likewise the convex head 32 will
FIG. 5 is a horizontal sectional view on the line 5-—5
?t just below the bulge of the calf muscle of the person’s
of FIG. 2, showing further details of the leg electrode;
leg, and the hollow 37 will engage the lower part of the
FIG. 6 is a vertical section on the line 6—6 of FIG. 2,
muscle, preventing the leg from moving sideways. The
showing the means of maintaining the leg electrode erect;
person’s shoe upon the floor produces a resistance against
and
which the spring 36 pushes. If the person does not feel
FIG. 7 is a sectional view through one of the arm elec
the push of the spring 36, he may move his foot backward
45
trodes on the line 7--7 of FIG. 3.
until he does feel it; the electrode 39 is then pressed against
Having reference now to the details of the drawing, I
his leg. The convex head on the plunger permits ‘a person
have shown in FIG. 1 a chair 10, illustrated in relation to
with long legs to push his heel backward, while a short
a person occupying it. The attitude of the person will be
person’s legs may stand outward from the chair; in either
observed to be entirely normal and relaxed except that he
case the leg will make contact with the electrode on the
has his sleeves and one trousers leg rolled up, to provide
convex curve.
the usual skin contact with the hereinafter described elec
It will be evident that ‘the chair may be used either in a
trodes. The chair 10 has arm-rests 11 and 12, and pref
special cardiograph room where it may be operated by
erably has legs 14 connected by fore and aft braces 15
a nurse or trained specialist, or it may be transported
and transverse braces 16, although any type of base for
to ‘a convenient site in a school, factory, or other facility
the chair may be used which is suitable for supporting the
where mass electrocardiograms may be accomplished, in
mechanism hereinafter described in connection with a leg
either case taking up less space and having less weight
patients’ limbs.
‘
than the usual couch.
The device is self-adjusting to persons of various heights
their upper sides, as best seen in FIG. 7, to provide
by the spring and the convex plunger head of the leg‘ elec
60
trough-like hollows 18 and 19 capable of receiving and
trode.
holding the arms of a person sitting in the chair. In the
The device is compact and can easily be transported,
bottoms of these hollows there are disposed electrodes
and occupies a minimum of space.
~
20, 21 land 22, mounted on plates 24 and 25 of insulating
It provides a simple, inexpensive means of'performing
material, and connected to a cardiograph machine (not
mass electrocardiograms with a minimum of inconven
shown) by electrical connections 26, 27, and 28. I prefer
ience to the patient and to the operator.
electrode.
.
The arms 11 and 12 are hollowed longitudinally on
to place two of the electrodes on one chair arm, and one
electrode on the other arm; the extra electrode on one
side takes the place of an electrode to contact the leg on
that side.
Connected to the lower part of the chair, as to the
transverse braces 16, ‘is a cylinder v30 containing a rod 31
I claim:
7
1. A chair for use in taking electrocardiograms which
includes:
a chair structure having ‘a base including legs, a seat,
a seat back and arm rests, said seat, seat back and
said arm rests being connected to one another and to’
3,043,291
-
v
3,
.
said base so as to be supported thereby, said arm ‘rests
having upper ‘surfaces of 5a trough-like shape;
‘an elongated ‘head extending generally parallel to said
A
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'1
_
and terminal means connected to each of said metal
electrodes.
2. A chair for use in taking electrocardiograms as de
?ned in claim 1, including another electrode means posi
base mounted on said base below said seat, said head
> having a from Svsfese lssatsé away from Said base 5 tioned within one of said surfaces of a trough-like shape
of a trough-like shape;
'
t
on ‘one of said arms, both of-isaid‘electrode means on‘ said
a
I ~ means'for~ hiasingis'aid elongated head away fromsaid
:Base connected to said'base‘and
head; '
an electrode means positioned within each of said sur
,
one of the said arms being of the same construction.
References Cited'in the ?le of this patent
faces of a trough-like shape, each of said velectrode’ 10
UNITED STATESv BATENTS
means including an insulator mounted Within the
Sharp __v____ -7 ________ __ Mar. 8,
238,721
trough-like 7surface"withinv which it is disposed, a
Ryberg _____ __‘ _____ __'__ May 28,
‘2,002,586
metal electrode 'positioned’onr each of said insulators,
1881
1935
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